phpMyAdmin, availability of security patches?

Looks like neither Debian 9 nor Ubuntu 18.04 are getting fixes for latest phpMyAdmin security flaws. Neither OS has the latest 4.8 version even in testing or other coming distributions yet.
Are those latest fixes already added to Debian and Ubuntu previously? I tried to look last weeks happenings, but did not find any mention. https://www.phpmyadmin.net/news/2018/12/11/security-fix-phpmyadmin-484-released/

Is that install script old? It uses 4.8.3 but the new PHP released on Monday is version 4.8.4.
If you have been running with that since summer, it looks like overwriting the apt-get installed /usr/share/phpmyadmin works. That would be a simple way to get that new phpMyAdmin.